Sectioning means for electric stations provided with accumulators.



E. BRANDENB'URG. SECTIOMNG MEANS FOR ELECTRIC STATIONS PROVIDED WITH ACCUMULATORS.

APPLICATION r1150 OCT. 2. 1911.

1,137,046, Patented Apr. 27, 1915.

jriyi I i. Q z

jf J witflnjyes: 1 v 5 6 Inventor: M5274 W WW Mma Attorney.

7145 NORRIS PETERS CO., FHOTO-LITHO.. WASHINI' ran D. c.

E. BRANDENBURG.

SECTIONING anus FOR ELECTRIC STATIONS PROVIDED WITH ACCUMULATORS.

APPUGATION FILED OCLZ. 19H- Witnesses:

,2. Wm WM wflm fl m, W 0M 1 E. BRANDENBURG. szcnoume MEANS FOR ELECTRIC STATIONS PROVIDED WITH ACCUMULATORS'. APPLICATION FILED 00122. 1911.

1,137,046 1 Patented Apr. 27, 1915 3 SHEETS-SHEET 3.

Fungus: flj 522 Attorney.

THE NORRIS PETERS 60.. PHOTO-Luna. wan-um,

, and eventual interruption'in the supply-ofthe defective section. 0*.

I To all whom it mag concern:

,7 1 mam-su marise; I or :BruissEL's; Barnum; a

V QT N NG EQTRIC sumac snowman wire Aswan-mans."

specification.

its object to subdivide the installation "of" central stations into difierent sections each comprising one or more dynamos' and to isolate these sections, automatically one from;

theother in case 'ofjaccidentto one of the dynamos in such a manner that disturbances the current to the mains may be confined to The present inventionhas for itsobject to avoid this partial stoppage I or to minimize these 'disturbancesi'n the supply of current H to the mains in works suchascentralcon-2 tinuous current stations and in sub-stations" for, transformingalternating current into continuouscurrent where batteries of accu- I t Now this would inevitably occur if the dy namos of the installation were noticonnect- 3 Inulators can Y operate in parallel 'with' the v "dynamos and in case ofanaccident, rendercurrent to the defective section automati cally and instantaneously 7 without operating:

7 and the sections should only be' 'interrupted v in case one or other of the dynamo units that mg these batteries operative automatically to supply the defective section with current. In order toenable the'battery to supply its charging and discharging'switchesit is obviously necessary to'isolate it from'the sound sections-as otherwise the counter '13. Mr F.

experienced by the latter uponthe battery-q *busibar 'ofthe batteryhereinafter. termed ex connections would prevent I vigorousdisr charge from them; as however-{thesesections;

must normallyfeed thef battery it is essential, that the connection between the latter these sections comprise is over loaded. In

accordance with the f present; :inventi on this I object is attained by the provision, in the circuit which connects thefsection with-the battery of accumulators; of an automatic isolating interrupter the operating"solenoid" of which is Y mounted in an independent Circuitcomprising a reversingrelay which'only-i closes upon the passageof a current proceed-r ing from theJsection to thebattery of accumu'lators and a; maximum relay which operates only when theintensity of the current i of "the dynamos of the section exceeds a};

Be it known that I, EDWIN BRAN ENBUR f a subject of the King of Belgium, 1 residing r at 14 Rue dEstouvelle;Brussels, in the King dom of Belgium; have invented'certain new and useful Improvements in Sectioning Means for Electric Stations Providedwith Acciunulators; of which the followin'g is a.

the dynamo or'dynamosyshould have anintensity' exceeding thislliniit value and also that it should I be proceeding from' the: sec-o v o qtion'toward the battery the interrupterre v niaining-closed ,for all a discharge current Y from the battery into the section.,' The connection of the dynamos of the installation p Spec ificationof Letters2atent; 1 Patented 1915. 'f Appli catio n filed October 2,1911]. seriamoiesaelej I i given value. 'Inorder that the automatic I isolating interrupter may open it-is thc'refore necessary ithat the current supplied by r by means ofbus: bars-provided with auto f matic SBClJIOIHIIg 1nterrupters,' the operation V ofwhichlis controlled by maximumtrelays actuated b the current of-othe dynamosi serves (at'timesfof smallconsumptionwhen. ;the[dynamosof-one of 'the sections are utiv liZed for supplying the 'feeders of I one org "more othersections-the dynamos of which are inoperative to prevent these: latter sec-i tions'fromremaining connected (if they are v sound) with the battery of accumulators,

the result of which would be that the latter in addition'to having to serve .the defective section would have toserve' all thesections the. .dynanios of which were inoperative so thatv it would very rapidly be exhausted.-

-ed by section barsbecausein this case if 'an accidentto one of-xthe runningdynamostook place the automatic interrupters of the I sound; sectionsythe, dynamos Lof which were running, Would bethe only ones which would be disconnected While the sections, dynamos of with the battery the current; traversing them which were stopped, would remain'connected being constantly directed from'the discharge r accordance With-my copending' application 5 #652,315 the sectioning interrupters corre-"' sponding tojthe -dynamos that are stopped cannot open "because their operation is, con

trolled by maximum relays actuated by the currentrof these dynamos in such amanner] that if the dynamos'of any section supply the adjacent section, the'dynamos of which are stopped the two sectionswill remain connected bythe.section bus'bars even in case of overload. 1 Consequently if one of the dynamos shouldstop as theresult of an jaccident the'dynamos ofthe sound sections cone 'tinue to'send their current through the sec:

*tion bus. bars into the sections thatthey permits of the disconnection of supply in such a manner that the current which circulates in the latter is tlien'dir'ect' ed from the section toward the battery which the corresponding isolating interrupter. Thus the battery ofaccumulatois Wl ll only have to furnish its current to the defective section and to those which were previously served by the latter. Nevertheless in exceptional cases of constant supply installations where the same number of dynamos are always running in conjunctionthe section bus bars can be dispensed with. The accompanying drawings show clearly the two characteristic TEOI-IIlS Of the present invention.

Figure l is a diagrammatic view showing an installation comprising four dynamos connected by an exchange bus bar with a battery of accumulators but not connected with. each other by section bars. Fig. 2 is a general view of an installation, the four dyn'amos of which are connected on the one.

battery of accumulators by hand with the an. exchange bar, and on the other hand one with the other by section bus bars provided with section interrupters. Fig. 3 is a more detailed diagrammatic view showing the deing an appropriate number of. feeders. The

vice for disconnecting the interrupter for isolating a section inv cases in which the sev eral sections of the works are not connected by section bus bars. Fig. l is a similar view a showing the means for disconnecting the isolating interrupter and the sectioning interrupter when the sections are connected by section bus bars. r

In the case of a sub-station for transforming 1 alternating current into continuous current each of the sections may comprise a certain number of motors (triphase current motors for example) which drive dynamos servsection represented in Fig. 3 comprises two triphase current motors '1 and 2 driving dynamos 3 and 4 provided inthe usual. manner with safety cut-outs 5.. These dynamos;

supply their current-to individual section bars 6 and 7 with which the feeders 10 that they serve are connected. The: bars 6 and 7 are also connected with exchange bars, 8, 9

or discharge bars from the battery or: ac-

cumulators 11 by conductors 12,;13 in which an automatic isolating interrupter 14= is interposed, its controlling solenoid 15 being mounted in the circuit of a battery of auxiliary cells 16. This circuit comprises a reversing relay 17, the controlling coil of which is branched off a shunt 18 interposed.

in the conductor 13; this relay closes only upon the passage of a current in the directionindicated by the arrow 19. The circuit of the battery 16 bifurcates into two other circuits20 and 21 each comprising a maximum relay 22 and 23,the controlling coil of which is connectedwith the terminals of shunt interposed in the section bar 6. Owing to the arrangement of these relays which only close thecircuit of the'battery V l6 when one or other of thedynainos 3 and at is overloaded the isolating interrupter 14 remains I closed normally notwithstanding the passage 'of a current circulating in the" direction of the arrow 19 for charging the battery 11. In case of accident producing overloading of the dynanios 3 and l the relays; 22 and 23 closeg in their turn and the battery 16 sends its current into the solenoid 15 to open the isolating interrupter 1e.

Assuming. asis the casein the. arrangemerit illustrated in Fig- 1 that the four:

dynamos ab 0 d of the station are connected by the; intermediary of automatic isolating interrupters e f g h with the exchange bar '11 y of. the battery of accumulators 7:; without being connected one withthe otherlgby sectionz bus bars and that at the moment under 7 consideratwn the four dynamics are run.-

ning to supply the mains ,.if. for any reason. one; of the .dynamos (the dynamos 0 for. example) should stop, the three. interrupters e 7th open. immediately in the manner de-- scribed so as to interrupt the connection between the corresponding dynainos a b d and the exchange bar of the battery k which. is' ;then able to send its current. without ob-.

stacle in to the defective sectionc. The objection mightbe raised that it would not appear to be desirable to throw all the power of the battery of accumulators upon a defective section whichv has produced an overload onits' generator. This would be correct if an accident had happened at; the

same time to all thefeeders suppliedlby this section but this is a very improbable case.

Considering then the most general case of. acc1dent,, such as a short-circuit, arising to one only of the. feeders of the section, it is desirable to continue to supply the other feeders. servedby the same dynamo. It is true that the defective feeder will receive a large supply of current fromthe battery of accumulatora but this supply will only be momentary, because it must not be forgotten that all the f'eeders are provided with the ordinary means ofprotection, which are of course not done away with although they are not referred to herein because they-form no part of the invention and they are represented diagrammatically on the drawings for the sake of clearness. The su ply; of

the defective feeder will take place only dur' ing the time required forthe operation of the; maximum interrupters or fuses, which separate the defective feeder from the other feeders of the section. The invention has for its object to provide the sound feeders of this. section'with current the battery of accumulators and not by the adjacent ma:

chines which might themselves become over- Tloaded. -This being stated, assuming that eams (a and clforexamplel aresuflicient for, supplying thegmainsfas aresult of the at the moment o flithe accident two of the.

stoppage of thev dynamo I. j the. dynamo a will be overloaded and" its isolating in terrupterc will-open while; the interrupt.-

ers f and hot the sections bd Which.,were

I supplied by the sections. a and c andxin fwith' automatic section interrupters 24,; The I which the currentxwas consequently directed from the exchange bar towardthe mains will" remain closed-so that. the battery-jot ace d cumulators' which}. has -;to-serve for; supplying the: three sections b 0" (Z willjbe overloaded and its protection devices t fwillj-be.

disconnected in their" turn; 'According; to: f the presentinventionfthis defect is avoided by-connecting the several {sections of the; station by bus. bars "Z :provided, with-auto" matic sectioning interrupter's. m,j 11,10, 1 as:

shown in -Fig. 2 ;-In addition the circuits which include the disconnectingzsolenoids of theisolating interruptersc, f, .g, h are branched upona multiplelline 8 common to all the sections 5 and on"'which areRalso" branched the disconnectingcircuits ofthe 1 sectioning interrupters m,'n, 0, pgcontrolled g by maximum relays branched on the 0011 nection of the generatorsfto the P1 bus bars; As. will be hereinafter explained the, are;

rangement is such that when one offlsaid maximum relays has operated, that1is,-;w'hen one of the dynamos of the installation is overloaded, the line 8 will be immediately, connectedto an auxiliary battery of cells or? other source of currentso'fas to permit of the operation of any; one ojttheinterrupters,

The. battery of cells which} controls the dis-Q connection of these interrupter-sis interposed in a circuit-(whichcan.only be. closed f when. the corresponding dynamo is running,- so that if an accident should happen'to one; of the running dynamos (the dynamo c forv example) the sectioninginterruptersw 7) current to the damaged section and to those sectionswhich by thecl'osing of the inter rupterp really form partof this section, all. the othersectionsiqfthe installation auto f matically isolating themselves from the battery of accumulators. This arrangement is;

illustrated'with more details in Fig. 4,.

The dynamos 3 and l-of each section "are 5 connected to sectionlbus bars 6 and 7 prefer? ably mounted ring-fashion and provided maximum relays2 2 and of these dynamos theydisconnecting"solenoid; 15* of the isolatbination; with the generators, bus bars betors 27and 28; this battery. serves/for the are connected by thecircuitsQO and 21 to the aconductors 27 .and28 of a general [line 26', w 27 ,-28 Theendsof; the circuit of a bat- *teryfof cells 1 6. are fixed to the conducv entire installation; This circuit comprises a solenoid 29 serving to control: an interrupter 30 1 which permits: of inter-posing 1 the battery '16 1 in the, circuit ofthe gen-1 eral conductors. 26 and 28.: The. circuit. of'

lug interrupter 14, which contains the re Versing relay 17 and theci'rcuit ofthe disconnecting solenoid 25 of the section inter- I rupter 24,. in which the locking contactsfil andl32 are inserted,are ,bothbranched off the conductors 26 andv 28i The latter 'may consist of a leaf spring or other similarfpart l which is pressed against a fixed contact by" apin fitted to the..-safety,cut-out 5 of the.

dynamo or to .thei'switch of its excitationv clrcuit, m'qsu'ch a manner. that contact.-,:,is'

made .onlywhen this switch is closed. Aslijt is-obVioUsthatWhen themachineis stopped.

these switches are heldfiopen, thereleasingi circuit of anyone of the sectioning switches. a

can only be closed whenthe corresponding dynamo isrunning. In theserconditions the dynamoflor dynamos should. be overloaded for any reason-the relays 22. and 23 act and close the circuit of the battery 16; the solenoid 29 "is thus energized and at.- trac tsnits armature 30in such a. manneras .to, interpose the batteryin the circuit of the general vconducto'rs26 and 28. The two locking contacts 31 and 32 or one ,of'themgonly being closed owing to the "operation of the dynarnos '3 and 4 or'of one of thein onlya I current is then sent into-the solenoid 25 to I openthe f-sectioninterrupter' 24. If the dynamo'sYofthe,adjacent section (for example the-'left-hand section in Fig; 4) are not runningno current can besent into the corresponding solenoid 25. owingto the open; 111g ofthese lockingcontactsand this section f will consequently remainconnected .withthe:

firstby-thesection bus harsh and 7. 1. In. the

two. sections. under-consideration; the current i will then" bedirected'in the direction-of the 1 sponding 'reversingmelays I17 willclose and; permit oftheqpajssage of the current {from f -the battery 16 through the solenoids 15 for arrow 19 in such a manner that the .correopening the isolating interrupters l l of each ofthesefsfictions; I i

invention is notlimited to the examples detions of a .secondaryna-ture can 'bemadel without'thereby departing from theprin cibple ofthe invention. 1

, t I 120, lt 'williof course. be-understoodthat the. Y

"scri-bed and represented as variousmodifica-Y I WhatI cl 'm and desire to secure by Let; 1

ters Patent'of the United States is '1; In an electric supply system, in com-1 f tween the generators and the feeders,-!sec tioninginterrupter-s in said bus bars, means acting on said sectioning interrupters; for i automatically sectioning the installation f in case of overload of a generator, an auxiliary source of current supply in parallel-with the generators, isolating interrupters between the aux liary source and the bus bars in each section formed between two consecu tive sectioning interrup'tcrs, connections between :the tripplngdevlces 'ofall the lnter rupters, and connections between the ftrip-' ping circuits of the'sectioning interrupter-s and: the safety interrupters of the generators for the vpurpose of automaticallyisolatmg the sections served by running generators in c'aseofoverl'oad of a generator and supplyl rent from the battery of accumulators to the ing thecurrent from the auxiliary source to the defective sectiononly.

In an electric supply system, in combination with thegenerators, bus bars be tween 1 the generators and the feeders, sectioning interrupters in said bus bars,means V acting onsaid sectioning interrupters for sectioning the installation in case of overload of a generator, a battery of accumu-' lators in parallel with the generators, an isolating iinterrupter arranged in the con nections-"of each section with said battery of accumulators, connectionsbetween the tripping :devices of all the interrupters, and

connections between the tripping, circuits of the sectioninginterrupters and the safety interrupters of the generators for thepur pose of automatically isolating the sections servedby running generators in case of overload'of a generator and supplyingthe curdefectivesection only,

3. In anelectri'c supply system, in combination with thegenerators, bus bars conducting current to the feeders, connections i between the generators and the bus bars, sectioning interrupters in said bus bars,:a battery common to all the sections, a general multiplelineiconnected to said battery, maximu'm currentirelays controlled'by the current of the connections between the generators and the bus bars and branched upon -='-saidageneral multiple line toenergize this line incaseof overload of agenerator, solenoids controlling said sectioning interrupters and branched'upon said general multiple line :for automatically sectioning the bus bars in case'of overload of: a generator,a battery of accumulators lnfpar'allel with the generators, an isolating interrupter in the connection of each section with said battery of accumulators, connections between the tripping devices of said isolating interrupters and the general multiple line, and connections between the-tripping circuits of the sectioning interrupters :and the safety interrupters of the generators for the purpose of "automatically isolating the sections .served by "running generators" in case of "overloadaof a generatora and supplying the current fromithe battery of-accumula tor s -to the defective section:only. V a

4:. :In *electric; supply :system, in "combination "with "the generators, :bus bars conduc ting current to "the feeders, connections i between the generators and the bus bars, safety mterrupters {1n -sa1dconnect1'ons, sec tionlng :mterrupters n sa d "bus bars, trip-i ping solenoids 1 controlling #said sectioning" interrupters', a battery common to all the sections, a general multiple "line connected to saidbattery, "tripping {circuits containing H said' tripping solenoids and branched upon said {general multiple: line, "locking'contacts inserted in 'thetripping' circuits'and actuated by said safety interrupters' so as to allow of the elosing of 1 the tripping circuit only V i when tlie corresponding generator is run nmgyma-xnnum current-relays controlled by the current passing through I the connections between the generators and the bus bars and branchedupon=saidfgeneral multiple line to energize this latter in case of overload, of a "generator, a battery of accumulators in parallel with the generators, an isolating interrupter in the connectionof each section with said battery of accumulators and conneeti'ons between the tripping devices of said isolating interrupters and the general ducting current to the 'feed'ers, connections between 1 the generators and the bus bars, safety 3 interrupters in said connections, sectioning interruptersin said busbars, tripping solenoids controlling said" sectioning interrupters, abattery common to all the seetions a general multiple line connected to said battery, trippingo circuits containing said trippin'g solenoids and branched upon 7 said general multiplealine, locking contacts inserted in the"tripping circuits =and actu- 5.- 'In' an electric supply-system,in 'comi bination with the generators, bus bars conated by "said safety -interrupters so as to r allow of f the closing of thetripping circuit only "when the corresponding generator -1s' running,-maximum current relays controlled by thec'urrent passing through theconnec T tions "between the generators and the 5 bus bars and branched upon said general line to energizefithislatter in case of overload "of a generator, a battery of'aceumulators in parallel with the generators, an 'isolating interrupter in the "connections ofeach sec-V tion with said battery of accumulators, a

tripping winding controlling said isolating interrupter, a tripping circuit branched upon said lgeneral'multiple line and *containing saidtrippi-ng winding, and reversing current relay controlled by the current thro 'lgh the connectionsbetween thebattery of"accumulators and thebus bars, said reversing current relay being adapted to A be battery of accumulators the section served Witnesses:

, automatically actuated by a current flovying from the bus bars to the "accumulators I I a a whehithe maximum relay of any overloaded In testlmony whereof I affix my eignature I V defective seictiononly. I

saidraccumillators, may be su pplied to I sectiomha's operated to 'o1ose the circuit of in presence ofltwo itnesses. the tripping windingandrso isolate from the EDWIN BBANDENBURG;

H. J.. E. Kmmmx,

by running generators in case of overload y m I CHAS. RoyNAsM1TH.-- I

of a generator in order that the current; of

I Copies 'of this patent 'mayTBe obtained for five centsieachy'by a ddressing t h g mmissi'oner of Pate r v l :7 A I WashingtoiLD, C. y Y 

